Join Date: Nov 2000
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Re: Hei OR Tfi?
I think they are both excellant upgrades. I'd base it on what was most readily available to me. If you can find a TFI coil and bracket lying around, the TFI upgrade is probably the cheapest. Then all you need is the adapter, cap and rotor. For the HEI, you will need the distributor, a new drive gear, and to replace at a minimum the cap and rotor. The TFI, you can buy it all off the shelf of your auto parts store, for the HEI, you could buy a distributor, but most likely chose to junkyard scrounge.
Flip a coin. I have the HEI, and like the unitized system and clean hookup of a single wire. If you plan to go fuel injection, I can tell you the HEI system is very compatible with a GM based throttle body system like Howell, or the Megasquirt.
The best argument for Teamrush's TFI system is the wide spacing of the terminals on the distributor cap, and the fact you retain your factory ignition curve (both mechanical and vacuum).